LG U8110 Service Manual page 115

4. TROUBLE SHOOTING
C. Microphone (Voice call, Voice Recorder, Video Recorder)
• Microphone Signal Flow
– MIC is enable by MIC Bias
– MICBAS, MICIP, MICIN signals to ABB ( Vincenne )
• Check Points
– Microphone bias
– Audio signal level of the microphone
– Soldering of components
• Signal from the mic
– MIC ->
– N2602(TJATTE2) on main board ->
– C2615 on main board ->
– Vincenne
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